JP4157633B2

JP4157633B2 - Lever device for traveling

Info

Publication number: JP4157633B2
Application number: JP35168898A
Authority: JP
Inventors: 俊明浦島
Original assignee: Ｉｈｉ建機株式会社
Priority date: 1998-12-10
Filing date: 1998-12-10
Publication date: 2008-10-01
Anticipated expiration: 2018-12-10
Also published as: JP2000168610A

Description

【０００１】
【発明の属する技術分野】
本発明は走行用レバー装置に関するものである。
【０００２】
【従来の技術】
図９及び図１０は作業機に適用されている従来の走行用レバー装置の一例を示すもので、この走行用レバー装置は、作業機の運転台に機体幅方向に並んで配置された２本の個別操作レバー１Ｌ，１Ｒと、機体幅方向に延び且つ該個別操作レバー１Ｌ，１Ｒの下端近傍部分を作業機床部に設けたブラケット２に枢支するピン３と、前端部がピン３に平行なピン４Ｌによって左側の個別操作レバー１Ｌの下端部に連結されたロッド５Ｌと、前端部がピン３に平行にピン４Ｒによって右側の個別操作レバー１Ｒの下端部に連結されたロッド５Ｒとを備えている。
【０００３】
一方のロッド５Ｌの後端部には、左側クローラ駆動用の液圧モータ２５Ｌへ作動流体を供給する方向切換弁２６のスプールが、直接、あるいは、他のロッドやリンクなどの変位伝達機構を介して連結され、他方のロッド５Ｒの後端部には、右側クローラ駆動用の液圧モータ２５Ｒへ作動流体を供給する方向切換弁２７のスプールが、直接、あるいは、変位伝達機構を介して連結されている。
【０００４】
この各方向切換弁２６，２７は、ロッド５Ｌ，５Ｒが中立位置から後方側へ移動するときに、液圧モータ２５Ｌ，２５Ｒに対してクローラ前進方向へ作動流体を供給し、また、ロッド５Ｌ，５Ｒが中立位置から前方側へ移動するときに、液圧モータ２５Ｌ，２５Ｒに対してクローラ後進方向へ作動流体を供給するように構成されている。
【０００５】
即ち、図９及び図１０に示す走行用レバー装置では、個別操作レバー１Ｌ，１Ｒを前方側へ傾動させると、当該個別操作レバー１Ｌ，１Ｒの下端部の変位に伴って、ロッド５Ｌ，５Ｒが中立位置から後方側へ移動し、各液圧モータ２５Ｌ，２５Ｒにより左右のクローラが前進方向へ周回する。
【０００６】
また、個別操作レバー１Ｌ，１Ｒを後方側へ傾動させると、当該個別操作レバー１Ｌ，１Ｒの下端部の変位に伴って、ロッド５Ｌ，５Ｒが中立位置から前方側へ移動し、各液圧モータ２５Ｌ，２５Ｒにより左右のクローラが後進方向へ周回する。
【０００７】
更に、作業機を右方へ転向する場合には、たとえば、個別操作レバー１Ｌを前方側へ傾動させて、左側のクローラを前進方向へ周回させるとともに、個別操作レバー１Ｒを後方側へ傾動させて、右側のクローラを後進方向へ周回させることにより、作業機の右方への転向を図る。
【０００８】
これとは逆に、作業機を左方へ転向する場合には、たとえば、個別操作レバー１Ｒを前方側へ傾動させて、右側のクローラを前進方向へ周回させるとともに、個別操作レバー１Ｌを後方側へ傾動させて、左側のクローラを後進方向へ周回させることにより、作業機の左方への転向を図る。
【０００９】
図１１乃至図１３は作業機に適用されている従来の走行用レバー装置の他の例を示すもので、この走行用レバー装置は、作業機の運転台に配置された１本の共通操作レバー１Ｃと、該共通操作レバー１Ｃの下端近傍部分を周方向に回動可能に且つ機体前後方向へ傾動可能に枢支する支持ブロック６と、該支持ブロック６を作業機床部に支持するブラケット７と、共通操作レバー１Ｃの下端部に固着され且つ機体幅方向両側へ突出するアーム９と、前端部が継手部材１０Ｌを介してアーム９の左端部に連結されたロッド１１Ｌと、前端部が継手部材１０Ｒを介してアーム９の右端部に連結されたロッド１１Ｒとを備えている。
【００１０】
一方のロッド１１Ｌの後端部には、右側クローラ駆動用の液圧モータ２５Ｒへ作動流体を供給する方向切換弁２７のスプールが、直接、あるいは、他のロッドやリンクなどの変位伝達機構を介して連結され、他方のロッド１１Ｒの後端部には、左側クローラ駆動用の液圧モータ２５Ｌへ作動流体を供給する方向切換弁２６のスプールが、直接、あるいは、変位伝達機構を介して連結されている。
【００１１】
この各方向切換弁２６，２７は、ロッド１１Ｌ，１１Ｒが中立位置から後方側へ移動するときに、液圧モータ２５Ｌ，２５Ｒに対してクローラ前進方向へ作動流体を供給し、また、ロッド１１Ｌ，１１Ｒが中立位置から前方側へ移動するときに、液圧モータ２５Ｌ，２５Ｒに対してクローラ後進方向へ作動流体を供給するように構成されている。
【００１２】
即ち、図１１乃至図１３に示す走行用レバー装置では、共通操作レバー１Ｃを前方側へ傾動させると、当該共通操作レバー１Ｃの下端部の変位に伴って、ロッド１１Ｌ，１１Ｒが中立位置から後方側へ移動し、各液圧モータ２５Ｌ，２５Ｒにより左右のクローラが前進方向へ周回する。
【００１３】
また、共通操作レバー１Ｃを後方側へ傾動させると、当該共通操作レバー１Ｃの下端部の変位に伴って、ロッド１１Ｌ，１１Ｒが中立位置から前方側へ移動し、各液圧モータ２５Ｌ，２５Ｒにより左右のクローラが後進方向へ周回する。
【００１４】
更に、作業機を右方へ転向する場合には、たとえば、共通操作レバー１Ｃを上方から見て時計回りに回動させて、左側のクローラを前進方向へ周回させるとともに、右側のクローラを後進方向へ周回させることにより、作業機の右方への転向を図る。
【００１５】
これとは逆に、作業機を左方へ転向する場合には、たとえば、共通操作レバー１Ｃを上方から見て反時計回りに回動させて、右側のクローラを前進方向へ周回させるとともに、左側のクローラを後進方向へ周回させることにより、作業機の左方への転向を図る。
【００１６】
【発明が解決しようとする課題】
近年、新たに製作される作業機には、図１１乃至図１３に示すような共通操作レバー１Ｃを備えた走行用レバー装置が適用されることが多いが、図９及び図１０に示すような個別操作レバー１Ｌ，１Ｒを備えた走行用レバー装置を希望するユーザもある。
【００１７】
しかしながら、図１１乃至図１３に示す走行用レバー装置では、左側のロッド１１Ｌが右側のクローラ駆動用液圧系の方向切換弁２７に連結され且つ右側のロッド１１Ｒが左側のクローラ駆動用液圧系の方向切換弁２６に連結されているのに対して、図９及び図１０に示す走行用レバー装置では、左側のロッド５Ｌが左側のクローラ駆動用液圧系の方向切換弁２６に連結され且つ右側のロッド５Ｒが右側のクローラ駆動用液圧系の方向切換弁２７に連結されているため、共通操作レバー１Ｃ、支持ブロック６、アーム９などを、個別操作レバー１Ｌ，１Ｒに置換しても、図９及び図１０に示す走行用レバー装置と同様な操作形態を再現することはできない。
【００１８】
本発明は上述した実情に鑑みてなしたもので、共通操作レバーを用いる操作形態と、個別操作レバーを用いる操作形態とを実施可能な走行用レバー装置を提供することを目的とするものである。
【００１９】
【課題を解決するための手段】
上記目的を達成するため、本発明の請求項１に記載の走行用レバー装置では、運転台に配置され且つ共通操作レバーの下端部が連結される中心レバー受け部材と、該中心レバー受け部材の上下方向中間部分を周方向に回動可能に且つ機体前後方向へ傾動可能に枢支する支持ブロックと、前記の中心レバー受け部材の下端部に固着され且つ機体幅方向両側へ突出するアームと、前端部がアームの左端部に連結され且つ後端部が右側のクローラ駆動用液圧系の方向切換弁のスプールを移動させる左側ロッドと、前端部がアームの右端部に連結され且つ後端部が左側のクローラ駆動用液圧系の方向切換弁のスプールを移動させる右側ロッドと、前記の中心レバー受け部材の左右に機体前後方向へ傾動し得るように配置され且つ個別操作レバーの下端部が連結される左側レバー受け部材及び右側レバー受け部材と、左側レバー受け部材の変位を右側ロッドへ伝達する第１の変位伝達部材と、右側レバー受け部材の変位を左側ロッドへ伝達する第２の変位伝達部材とを備えている。
【００２０】
本発明の請求項２に記載の走行用レバー装置では、運転台に配置され且つ共通操作レバーの下端部が連結される中心レバー受け部材と、該中心レバー受け部材の上下方向中間部分を周方向に回動可能に且つ機体前後方向へ傾動可能に枢支する支持ブロックと、前記の中心レバー受け部材の下端部に固着され且つ機体幅方向両側へ突出するアームと、前端部がアームの左端部に連結され且つ後端部が右側のクローラ駆動用液圧系の方向切換弁のスプールを移動させる左側ロッドと、前端部がアームの右端部に連結され且つ後端部が左側のクローラ駆動用液圧系の方向切換弁のスプールを移動させる右側ロッドと、前記の中心レバー受け部材の左右に機体前後方向へ傾動し得るように配置され且つ個別操作レバーの下端部が連結される左側レバー受け部材及び右側レバー受け部材と、左側レバー受け部材の変位をアームの右端部へ伝達する第１の変位伝達部材と、右側レバー受け部材の変位をアームの左端部へ伝達する第２の変位伝達部材とを備えている。
【００２１】
本発明の請求項３に記載の走行用レバー装置では、運転台に配置され且つ共通操作レバーの下端部が連結される中心レバー受け部材と、該中心レバー受け部材の上下方向中間部分を周方向に回動可能に且つ機体前後方向へ傾動可能に枢支する支持ブロックと、前記の中心レバー受け部材の下端部に固着され且つ機体幅方向両側へ突出するアームと、前端部がアームの左端部に連結され且つ後端部が右側のクローラ駆動用液圧系の方向切換弁のスプールを移動させる左側ロッドと、前端部がアームの右端部に連結され且つ後端部が左側のクローラ駆動用液圧系の方向切換弁のスプールを移動させる右側ロッドと、前記の中心レバー受け部材の左右に機体前後方向へ傾動し得るように配置され且つ個別操作レバーの下端部が連結される左側レバー受け部材及び右側レバー受け部材と、左側レバー受け部材の変位を左側ロッドへ伝達する第１の変位伝達部材と、右側レバー受け部材の変位を右側ロッドへ伝達する第２の変位伝達部材とを備え、左側レバー受け部材に連結される個別操作レバーの上端部が右側レバー受け部材に連結される個別装置レバーの上端部の右側に位置するように、両個別操作レバーの少なくとも一方を屈曲させている。
【００２２】
本発明の請求項４に記載の走行用レバー装置では、運転台に配置され且つ共通操作レバーの下端部が連結される中心レバー受け部材と、該中心レバー受け部材の上下方向中間部分を周方向に回動可能に且つ機体前後方向へ傾動可能に枢支する支持ブロックと、前記の中心レバー受け部材の下端部に固着され且つ機体幅方向両側へ突出するアームと、前端部がアームの左端部に連結され且つ後端部が右側のクローラ駆動用液圧系の方向切換弁のスプールを移動させる左側ロッドと、前端部がアームの右端部に連結され且つ後端部が左側のクローラ駆動用液圧系の方向切換弁のスプールを移動させる右側ロッドと、前記の中心レバー受け部材の左右に機体前後方向へ傾動し得るように配置され且つ個別操作レバーの下端部が連結される左側レバー受け部材及び右側レバー受け部材と、左側レバー受け部材の変位をアームの左端部へ伝達する第１の変位伝達部材と、右側レバー受け部材の変位をアームの右端部へ伝達する第２の変位伝達部材とを備え、左側レバー受け部材に連結される個別操作レバーの上端部が右側レバー受け部材に連結される個別装置レバーの上端部の右側に位置するように、両個別操作レバーの少なくとも一方を屈曲させている。
【００２３】
本発明の請求項１乃至請求項４に記載の走行用レバー装置のいずれにおいても、中心レバー受け部材に下端部が連結された共通操作レバーの変位を、中心レバー受け部材、アーム、両ロッドを介して、左側のクローラ駆動用液圧系の方向切換弁のスプール、並びに右側のクローラ駆動用液圧系の方向切換弁のスプールに伝達する。
【００２４】
本発明の請求項１に記載の走行用レバー装置においては、左側レバー受け部材に下端部が連結された個別操作レバーの変位を、左側レバー受け部材、第１の変位伝達部材、右側ロッドを介して、左側のクローラ駆動用液圧系の方向切換弁のスプールに伝達し、右側レバー受け部材に下端部が連結された個別操作レバーの変位を、右側レバー受け部材、第２の変位伝達部材、左側ロッドを介して、右側のクローラ駆動用液圧系の方向切換弁のスプールに伝達する。
【００２５】
本発明の請求項２に記載の走行用レバー装置においては、左側レバー受け部材に下端部が連結された個別操作レバーの変位を、左側レバー受け部材、第１の変位伝達部材、アームの右端部、右側ロッドを介して、左側のクローラ駆動用液圧系の方向切換弁のスプールに伝達し、右側レバー受け部材に下端部が連結された個別操作レバーの変位を、右側レバー受け部材、第２の変位伝達部材、アームの左端部、左側ロッドを介して、右側のクローラ駆動用液圧系の方向切換弁のスプールに伝達する。
【００２６】
本発明の請求項３に記載の走行用レバー装置においては、上端部が右側に位置し且つ左側レバー受け部材に下端部が連結された個別操作レバーの変位を、左側レバー受け部材、第１の変位伝達部材、左側ロッドを介して、右側のクローラ駆動用液圧系の方向切換弁のスプールに伝達し、上端部が左側に位置し且つ右側レバー受け部材に下端部が連結された個別操作レバーの変位を、右側レバー受け部材、第２の変位伝達部材、右側ロッドを介して、左側のクローラ駆動用液圧系の方向切換弁のスプールに伝達する。
【００２７】
本発明の請求項４に記載の走行用レバー装置においては、上端部が右側に位置し且つ左側レバー受け部材に下端部が連結された個別操作レバーの変位を、左側レバー受け部材、第１の変位伝達部材、アームの左端部、左側ロッドを介して、右側のクローラ駆動用液圧系の方向切換弁のスプールに伝達し、上端部が左側に位置し且つ右側レバー受け部材に下端部が連結された個別操作レバーの変位を、右側レバー受け部材、第２の変位伝達部材、アームの右端部、右側ロッドを介して、左側のクローラ駆動用液圧系の方向切換弁のスプールに伝達する。
【００２８】
【発明の実施の形態】
以下、本発明の実施の形態を、図示例と共に説明する。
【００２９】
図１乃至図４は本発明の走行用レバー装置の実施の形態の第１の例を示すもので、図中、図９乃至図１３と同一の符号を付した部分は同一物を表している。
【００３０】
この走行用レバー装置では、作業機の運転台の床面上に設けた架台２８に支持ブロック１２を取り付け、該支持ブロック１２によって中心レバー受け部材１３の上下方向中間部位を、周方向に回動可能に且つ機体の前後方向へ傾動可能に枢支している。
【００３１】
中心レバー受け部材１３の上端部は、共通操作レバー１４の下端部が着脱され得るように形成され、また、中心レバー受け部材１３の下端部には、機体幅方向両側へ突出するアーム１５が固着されている。
【００３２】
アーム１５の左端部には、後端部が図４に示すように右側のクローラ駆動用液圧系の方向切換弁２７のスプールに接続された左側ロッド１６Ｌの前端部が連結され、アーム１５の右端部には、後端部が図４に示すように左側のクローラ駆動用液圧系の方向切換弁２６のスプールに接続された右側ロッド１６Ｒの前端部が連結されており、中心レバー受け部材１３の回動が、アーム１５、及びロッド１６Ｌ，１６Ｒを介して両方向切換弁２７，２６のスプールに伝達されるようになっている。
【００３３】
更に、架台２８の前側部分には、左側レバー受け部材１７Ｌと右側レバー受け部材１７Ｒとが、機体幅方向に延びるピン２９によって、前後方向へ傾動可能に枢支されている。
【００３４】
左側レバー受け部材１７Ｌは、左側個別操作レバー１８Ｌの下端部が着脱され得るように形成されており、この左側レバー受け部材１７Ｌの下端部には、斜め右下方へ延びる中間レバー３０の上端部が固着されている。
【００３５】
中間レバー３０の下端部は、図４に示すように前記の右側ロッド１６Ｒの前端部近傍に第１の継手部材１９により連結され、左側レバー受け部材１７Ｌの変位が、中間レバー３０及び第１の継手部材１９を介して右側ロッド１６Ｒへ伝達されるようになっている。
【００３６】
右側レバー受け部材１７Ｒは、右側個別操作レバー１８Ｒの下端部が着脱され得るように形成されており、この右側レバー受け部材１７Ｒの下端部には、斜め左下方へ延びる中間レバー３１の上端部が固着されている。
【００３７】
中間レバー３１の下端部は、図４に示すように前記の左側ロッド１６Ｌの前端部近傍に第２の継手部材２０により連結され、右側レバー受け部材１７Ｒの変位が、中間レバー３１及び第２の継手部材２０を介して左側ロッド１６Ｌへ伝達されるようになっている。
【００３８】
図１乃至図４に示す走行用レバー装置において、共通操作レバー１４を使って作業機を運転するに際しては、中心レバー受け部材１３に共通操作レバー１４を装着する。
【００３９】
この状態で、共通操作レバー１４を前方側へ傾動させると、中心レバー受け部材１３の下端部の変位に伴って、アーム１５及び両ロッド１６Ｌ，１６Ｒが中立位置から後方側へ移動し、各液圧モータ２５Ｌ，２５Ｒにより左右のクローラが前進方向へ周回する。
【００４０】
また、共通操作レバー１４を後方側へ傾動させると、中心レバー受け部材１３の下端部の変位に伴って、アーム１５及び両ロッド１６Ｌ，１６Ｒが中立位置から前方側へ移動し、各液圧モータ２５Ｌ，２５Ｒにより左右のクローラが後進方向へ周回する。
【００４１】
更に、作業機を右方へ転向する場合には、たとえば、共通操作レバー１４を上方から見て時計回りに回動させると、中心レバー受け部材１３の下端部の変位に伴ってアーム１５も同じ方向に回動するので、左側ロッド１６Ｌが中立位置から前方側へ移動して右側のクローラが後進方向へ周回するとともに、右側ロッド１６Ｒが中立位置から後方側へ移動して左側のクローラが前進方向へ周回し、作業機の右方への転向が図られる。
【００４２】
これとは逆に、作業機を左方へ転向する場合には、たとえば、共通操作レバー１４を上方から見て反時計回りに回動させると、中心レバー受け部材１３の下端部の変位に伴ってアーム１５も同じ方向に回動するので、左側ロッド１６Ｌが中立位置から後方側へ移動して右側のクローラが前進方向へ周回するとともに、右側ロッド１６Ｒが中立位置から前方側へ移動して左側のクローラが後進方向へ周回し、作業機の左方への転向が図られる。
【００４３】
また、図１乃至図４に示す走行用レバー装置において、各個別操作レバー１８Ｌ，１８Ｒを使って作業機を運転するに際しては、左側レバー受け部材１７Ｌに左側個別操作レバー１８Ｌを装着し、右側レバー受け部材１７Ｒに右側個別操作レバー１８Ｒを装着する。
【００４４】
この状態で、各個別操作レバー１８Ｌ，１８Ｒを共に前方側へ傾動させると、各レバー受け部材１７Ｌ，１７Ｒの下端部の変位に伴って、アーム１５及び両ロッド１６Ｌ，１６Ｒが中立位置から後方側へ移動し、各液圧モータ２５Ｌ，２５Ｒにより左右のクローラが前進方向へ周回する。
【００４５】
また、各個別操作レバー１８Ｌ，１８Ｒを共に後方側へ傾動させると、各レバー受け部材１７Ｌ，１７Ｒの下端部の変位に伴って、アーム１５及び両ロッド１６Ｌ，１６Ｒが中立位置から前方側へ移動し、各液圧モータ２５Ｌ，２５Ｒにより左右のクローラが後進方向へ周回する。
【００４６】
更に、作業機を右方へ転向する場合には、たとえば、左側個別操作レバー１８Ｌを前方側へ傾動させて、左側のクローラを前進方向へ周回させるとともに、右側個別操作レバー１８Ｒを後方側へ傾動させて、右側のクローラを後進方向へ周回させることにより、作業機の右方への転向を図る。
【００４７】
これとは逆に、作業機を左方へ転向する場合には、たとえば、右側個別操作レバー１８Ｒを前方側へ傾動させて、右側のクローラを前進方向へ周回させるとともに、左側個別操作レバー１８Ｌを後方側へ傾動させて、左側のクローラを後進方向へ周回させることにより、作業機の左方への転向を図る。
【００４８】
このように、図１乃至図４に示す走行用レバー装置では、左側のクローラ駆動用液圧系の方向切換弁２６に連結されている右側のロッド１６Ｒに対して、左側個別操作レバー１８Ｌが装着される左側レバー受け部材１７Ｌの変異を、中間レバー３０及び第１の継手部材１９を介して伝達し、右側のクローラ駆動用液圧系の方向切換弁２７に連結されている左側のロッド１６Ｌに対して、右側個別操作レバー１８Ｒが装着される右側レバー受け部材１７Ｒの変異を、中間レバー３１及び第２の継手部材２０を介して伝達するので、図９及び図１０に示す走行用レバー装置と同様な操作形態を再現することができる。
【００４９】
なお、図１乃至図４に示す走行用レバー装置では、中間レバー３０，３１の変位を継手部材１９，２０を介してロッド１６Ｒ，１６Ｌに伝達する構成としたが、中間レバー３０，３１の変位をアーム１５の右端部及び左端部に伝達する構成としてもよい。
【００５０】
図５乃至図８は本発明の走行用レバー装置の実施の形態の第２の例を示すもので、図中、図１乃至図４と同一の符号を付した部分は同一物を表している。
【００５１】
この走行用レバー装置では、架台２８の前側部分に左側レバー受け部材２１Ｌと右側レバー受け部材２１Ｒとを、機体幅方向に延びるピン２９によって、前後方向へ傾動可能に枢支している。
【００５２】
左側レバー受け部材２１Ｌは、左側個別操作レバー２２Ｌの下端部が着脱され得るように形成されており、この左側レバー受け部材２１Ｌの下端部には、下方へ延びる中間レバー３２の上端部が固着されている。
【００５３】
中間レバー３２の下端部は、図８に示すように前記の左側ロッド１６Ｌの前端部近傍に第１の継手部材２３により連結され、左側レバー受け部材２１Ｌの変位が、中間レバー３２及び第１の継手部材２３を介して左側ロッド１６Ｌへ伝達されるようになっている。
【００５４】
右側レバー受け部材２１Ｒは、右側個別操作レバー２２Ｒの下端部が着脱され得るように形成されており、この右側レバー受け部材２１Ｒの下端部には、下方へ延びる中間レバー３３の上端部が固着されている。
【００５５】
中間レバー３３の下端部は、図８に示すように前記の右側ロッド１６Ｒの前端部近傍に第２の継手部材２４により連結され、右側レバー受け部材２１Ｒの変位が、中間レバー３３及び第２の継手部材２４を介して右側ロッド１６Ｒへ伝達し得るようになっている。
【００５６】
更に、左側レバー受け部材２１Ｌに連結される左側個別操作レバー２２Ｌの上端部が、図６に示すように右側レバー受け部材２１Ｒに連結される右側個別操作レバー２２Ｒの上端部の右側に位置し且つ当該右側個別操作レバー２２Ｒの前後方向への傾動を阻害しないように、左側個別操作レバー２２Ｌの中間部を、前方側及び右側へ屈曲させている。
【００５７】
図５乃至図８に示す走行用レバー装置において、共通操作レバー１４を使って作業機を運転するに際しては、中心レバー受け部材１３に共通操作レバー１４を装着する。
【００５８】
この状態で共通操作レバー１４を前方側、後方側、上方から見て時計回り、あるいは反時計回りに回動させると、図１乃至図４に示す走行用レバー装置を適用した作業機と同様に、作業機が前進、後進、右方転向、あるいは左方転向する。
【００５９】
また、図５乃至図８に示す走行用レバー装置において、各個別操作レバー２２Ｌ，２２Ｒを使って作業機を運転するに際しては、左側レバー受け部材２１Ｌに左側個別操作レバー２２Ｌを装着し、右側レバー受け部材２１Ｒに右側個別操作レバー２２Ｒを装着する。
【００６０】
この状態で各個別操作レバー２２Ｌ，２２Ｒを共に前方側へ傾動させると、各レバー受け部材２１Ｌ，２１Ｒの下端部の変位に伴って、アーム１５及び両ロッド１６Ｌ，１６Ｒが中立位置から後方側へ移動し、各液圧モータ２５Ｌ，２５Ｒにより左右のクローラが前進方向へ周回する。
【００６１】
また、各個別操作レバー２２Ｌ，２２Ｒを共に後方側へ傾動させると、各レバー受け部材２１Ｌ，２１Ｒの下端部の変位に伴って、アーム１５及び両ロッド１６Ｌ，１６Ｒが中立位置から前方側へ移動し、各液圧モータ２５Ｌ，２５Ｒにより左右のクローラが後進方向へ周回する。
【００６２】
更に、作業機を右方へ転向する場合には、たとえば、左側個別操作レバー２２Ｌ（上端部が右側にある）を後方側へ傾動させて、右側のクローラを後進方向へ周回させるとともに、右側個別操作レバー１８Ｒ（上端部が左側にある）を前方側へ傾動させて、左側のクローラを前進方向へ周回させることにより、作業機の右方への転向を図る。
【００６３】
これとは逆に、作業機を左方へ転向する場合には、たとえば、右側個別操作レバー１８Ｒ（上端部が左側にある）を後方側へ傾動させて、左側のクローラを後進方向へ周回させるとともに、左側個別操作レバー１８Ｌ（上端部が右側にある）を後方側へ傾動させて、左側のクローラを後進方向へ周回させることにより、作業機の左方への転向を図る。
【００６４】
このように、図５乃至図８に示す走行用レバー装置では、左側のクローラ駆動用液圧系の方向切換弁２６に連結されている右側のロッド１６Ｒに対して、上端部が左側に位置する右側個別操作レバー２２Ｒが装着される右側レバー受け部材２１Ｒの変位を、中間レバー３２及び第２の継手部材２４を介して伝達し、右側のクローラ駆動用液圧系の方向切換弁２７に連結されている左側のロッド１６Ｌに対して、上端部が右側に位置する左側個別操作レバー２２Ｌが装着される左側レバー受け部材２１Ｌの変位を、中間レバー３３及び第１の継手部材２３を介して伝達するので、図９及び図１０に示す走行用レバー装置と同様な操作形態を再現することができる。
【００６５】
なお、図５乃至図８に示す走行用レバー装置では、中間レバー３２，３３の変位を継手部材２３，２４を介してロッド１６Ｌ，１６Ｒに伝達する構成としたが、中間レバー３２，３３の変位をアーム１５の左端部及び右端部に伝達する構成としてもよく、また、左側個別操作レバー２２Ｌの上端を右側方向へ屈曲することに替えて、右側個別操作レバー２２Ｒの上端を左側方向へ屈曲させてもよい。
【００６６】
なお、本発明の走行用レバー装置は上述した実施の形態のみに限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々変更を加え得ることは勿論である。
【００６７】
【発明の効果】
以上述べたように、本発明の走行用レバー装置によれば、下記のような種々の優れた効果を奏し得る。
【００６８】
（１）本発明の請求項１及び請求項３に記載の走行用レバー装置のいずれにおいても、中心レバー受け部材に下端部が連結される共通操作レバーの変位を、中心レバー受け部材、アーム、ロッドを介して、左右のクローラ駆動用液圧系の方向切換弁のスプールに伝達し、また、各レバー受け部材に下端部が連結される個別操作レバーの変位を、レバー受け部材、変位伝達部材、ロッドを介して、左右のクローラ駆動用液圧系の方向切換弁のスプールに伝達するので、操作レバーの交換を行なうだけで、共通操作レバーを用いる操作形態と個別操作レバーを用いる操作形態とを実施することができる。
【００６９】
（２）本発明の請求項２及び請求項４に記載の走行用レバー装置のいずれにおいても、中心レバー受け部材に下端部が連結される共通操作レバーの変位を、中心レバー受け部材、アーム、ロッドを介して、左右のクローラ駆動用液圧系の方向切換弁のスプールに伝達し、また、各レバー受け部材に下端部が連結される個別操作レバーの変位を、レバー受け部材、変位伝達部材、アーム、ロッドを介して、左右のクローラ駆動用液圧系の方向切換弁のスプールに伝達するので、操作レバーの交換を行なうだけで、共通操作レバーを用いる操作形態と個別操作レバーを用いる操作形態とを実施することができる。
【図面の簡単な説明】
【図１】本発明の走行用レバー装置の実施の形態の第１の例を示す側面図である。
【図２】図１のＩＩ−ＩＩ矢視図である。
【図３】図１のＩＩＩ−ＩＩＩ矢視図である。
【図４】図１に関連する各操作レバーとクローラ駆動用液圧系との関係を示す概念図である。
【図５】本発明の走行用レバー装置の実施の形態の第２の例を示す側面図である。
【図６】図５のＶＩ−ＶＩ矢視図である。
【図７】図５のＶＩＩ−ＶＩＩ矢視図である。
【図８】図５に関連する各操作レバーとクローラ駆動用液圧系との関係を示す概念図である。
【図９】従来の走行用レバー装置の一例を示す側面図である。
【図１０】図９に関連する各操作レバーとクローラ駆動用液圧系との関係を示す概念図である。
【図１１】従来の走行用レバー装置の他の例を示す側面図である。
【図１２】図１１のＸＩＩ−ＸＩＩ矢視図である。
【図１３】図１１に関連する各操作レバーとクローラ駆動用液圧系との関係を示す概念図である。
【符号の説明】
１２支持ブロック
１３中心レバー受け部材
１４共通操作レバー
１５アーム
１６Ｌ左側ロッド
１６Ｒ右側ロッド
１７Ｌ左側レバー受け部材
１７Ｒ右側レバー受け部材
１８Ｌ左側個別操作レバー
１８Ｒ右側個別操作レバー
１９第１の継手部材（第１の変位伝達部材）
２０第２の継手部材（第２の変位伝達部材）
２１Ｌ左側レバー受け部材
２１Ｒ右側レバー受け部材
２２Ｌ左側個別操作レバー
２２Ｒ右側個別操作レバー
２３第１の継手部材（第１の変位伝達部材）
２４第２の継手部材（第２の変位伝達部材）
２６方向切換弁（左側のクローラ駆動用液圧系）
２７方向切換弁（右側のクローラ駆動用液圧系）
３０中間レバー（第１の変位伝達部材）
３１中間レバー（第２の変位伝達部材）
３２中間レバー（第１の変位伝達部材）
３３中間レバー（第２の変位伝達部材）[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a travel lever device.
[0002]
[Prior art]
FIG. 9 and FIG. 10 show an example of a conventional traveling lever device applied to a work machine, and this traveling lever device is arranged in two on the cab of the working machine, arranged side by side in the body width direction. Individual operation levers 1L and 1R, a pin 3 extending in the width direction of the machine body and pivotally supported by a bracket 2 provided at the lower end portion of the individual operation levers 1L and 1R on the work machine floor, and a front end portion parallel to the pin 3 A rod 5L connected to the lower end portion of the left individual operation lever 1L by a pin 4L, and a rod 5R having a front end portion connected to the lower end portion of the right individual operation lever 1R by a pin 4R in parallel with the pin 3. ing.
[0003]
At the rear end of one rod 5L, a spool of a direction switching valve 26 that supplies the working fluid to the hydraulic motor 25L for driving the left crawler is directly or via a displacement transmission mechanism such as another rod or link. The spool of the direction switching valve 27 that supplies the working fluid to the hydraulic motor 25R for driving the right crawler is connected directly or via a displacement transmission mechanism to the rear end of the other rod 5R. ing.
[0004]
The direction switching valves 26 and 27 supply the working fluid in the crawler forward direction to the hydraulic motors 25L and 25R when the rods 5L and 5R move rearward from the neutral position. When 5R moves from the neutral position to the front side, the hydraulic fluid is supplied to the hydraulic motors 25L and 25R in the reverse direction of the crawler.
[0005]
That is, in the traveling lever device shown in FIGS. 9 and 10, when the individual operation levers 1L and 1R are tilted forward, the rods 5L and 5R are moved along with the displacement of the lower ends of the individual operation levers 1L and 1R. Moving from the neutral position to the rear side, the left and right crawlers circulate in the forward direction by the hydraulic motors 25L and 25R.
[0006]
Further, when the individual operation levers 1L and 1R are tilted rearward, the rods 5L and 5R move from the neutral position to the front side in accordance with the displacement of the lower ends of the individual operation levers 1L and 1R. The left and right crawlers go around in the reverse direction by 25L and 25R.
[0007]
Furthermore, when turning the work implement to the right, for example, the individual operation lever 1L is tilted forward, the left crawler is rotated in the forward direction, and the individual operation lever 1R is tilted backward. By turning the right crawler in the backward direction, the work implement is turned to the right.
[0008]
On the other hand, when turning the work implement to the left, for example, the individual operation lever 1R is tilted forward, the right crawler is rotated forward, and the individual operation lever 1L is moved backward. The work implement is turned to the left by rotating the left crawler in the backward direction.
[0009]
FIG. 11 to FIG. 13 show another example of a conventional traveling lever device applied to a working machine. This traveling lever device has one common operating lever arranged on the cab of the working machine. 1C, a support block 6 that pivotally supports a portion near the lower end of the common operation lever 1C so as to be rotatable in the circumferential direction and tiltable in the longitudinal direction of the machine body, and a bracket 7 for supporting the support block 6 on the work machine floor. The arm 9 fixed to the lower end of the common operation lever 1C and projecting to both sides in the body width direction, the rod 11L having the front end connected to the left end of the arm 9 via the joint member 10L, and the front end being a joint member And a rod 11R connected to the right end of the arm 9 through 10R.
[0010]
At the rear end of one rod 11L, a spool of a direction switching valve 27 that supplies the working fluid to the hydraulic motor 25R for driving the right crawler is directly or via a displacement transmission mechanism such as another rod or link. The spool of the direction switching valve 26 that supplies the working fluid to the hydraulic motor 25L for driving the left crawler is connected directly or via a displacement transmission mechanism to the rear end of the other rod 11R. ing.
[0011]
The direction switching valves 26 and 27 supply the working fluid in the crawler forward direction to the hydraulic motors 25L and 25R when the rods 11L and 11R move rearward from the neutral position. When 11R moves from the neutral position to the front side, the working fluid is supplied to the hydraulic motors 25L, 25R in the reverse direction of the crawler.
[0012]
That is, in the travel lever device shown in FIGS. 11 to 13, when the common operation lever 1C is tilted forward, the rods 11L and 11R are moved backward from the neutral position in accordance with the displacement of the lower end portion of the common operation lever 1C. The left and right crawlers circulate in the forward direction by the hydraulic motors 25L and 25R.
[0013]
When the common operation lever 1C is tilted rearward, the rods 11L and 11R move from the neutral position to the front side with the displacement of the lower end portion of the common operation lever 1C, and the hydraulic motors 25L and 25R The left and right crawlers go around in the reverse direction.
[0014]
Further, when turning the work implement to the right, for example, the common operation lever 1C is rotated clockwise as viewed from above to rotate the left crawler in the forward direction and the right crawler in the reverse direction. By turning to the right, the work implement is turned to the right.
[0015]
On the contrary, when turning the work implement to the left, for example, the common operation lever 1C is rotated counterclockwise as viewed from above, and the right crawler is rotated in the forward direction and the left side is rotated. By turning the crawler in the backward direction, the work machine is turned to the left.
[0016]
[Problems to be solved by the invention]
In recent years, a traveling lever device having a common operation lever 1C as shown in FIG. 11 to FIG. 13 is often applied to a newly manufactured working machine, but as shown in FIG. 9 and FIG. Some users desire a travel lever device equipped with individual control levers 1L, 1R.
[0017]
However, in the travel lever device shown in FIGS. 11 to 13, the left rod 11L is connected to the direction switching valve 27 of the right crawler driving hydraulic system and the right rod 11R is connected to the left crawler driving hydraulic system. 9 and FIG. 10, the left rod 5L is connected to the left crawler driving hydraulic pressure direction switching valve 26 in the traveling lever device shown in FIGS. Since the right rod 5R is connected to the right crawler driving hydraulic pressure direction switching valve 27, the common operation lever 1C, the support block 6, the arm 9 and the like can be replaced with the individual operation levers 1L and 1R. 9 and FIG. 10 cannot reproduce the same operation mode as the travel lever device.
[0018]
The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a travel lever device capable of performing an operation mode using a common operation lever and an operation mode using an individual operation lever. .
[0019]
[Means for Solving the Problems]
In order to achieve the above object, in the traveling lever device according to claim 1 of the present invention, a central lever receiving member disposed on the driver's cab and connected to the lower end of the common operating lever, and the central lever receiving member A support block that pivotally supports an intermediate portion in the vertical direction so as to be rotatable in the circumferential direction and tiltable in the longitudinal direction of the aircraft, an arm fixed to the lower end of the central lever receiving member and protruding to both sides in the aircraft width direction; The front end is connected to the left end of the arm and the rear end is connected to the left rod for moving the spool of the right crawler driving hydraulic pressure direction switching valve, and the front end is connected to the right end of the arm and the rear end. The right rod for moving the spool of the directional switching valve for the hydraulic system for driving the left crawler, and the lower end of the individual operation lever arranged so as to be able to tilt to the left and right of the central lever receiving member in the longitudinal direction of the fuselage A left lever receiving member and a right lever receiving member, a first displacement transmitting member for transmitting the displacement of the left lever receiving member to the right rod, and a second for transmitting the displacement of the right lever receiving member to the left rod. A displacement transmission member.
[0020]
In the traveling lever device according to claim 2 of the present invention, a central lever receiving member disposed on the cab and to which a lower end portion of the common operation lever is connected, and an intermediate portion in the vertical direction of the central lever receiving member in the circumferential direction. A support block pivotally supported to be pivotable in the longitudinal direction of the machine body, an arm fixed to the lower end portion of the central lever receiving member and projecting to both sides in the machine body width direction, and a front end portion of the left end portion of the arm A left rod that moves the spool of the directional control valve of the hydraulic system for crawler driving with the rear end connected to the right side, and a crawler driving fluid with the front end connected to the right end of the arm and the rear end connected to the left crawler driving fluid. A right rod that moves the spool of the pressure direction switching valve, and a left lever that is arranged to be able to tilt in the longitudinal direction of the fuselage to the left and right of the central lever receiving member and to which the lower end of the individual operation lever is connected A first displacement transmission member for transmitting the displacement of the left and right lever receiving member to the right end portion of the arm, and a second displacement transmission for transmitting the displacement of the right lever receiving member to the left end portion of the arm. And a member.
[0021]
In the traveling lever device according to claim 3 of the present invention, a central lever receiving member disposed on the cab and to which a lower end portion of the common operation lever is coupled, and an intermediate portion in the vertical direction of the central lever receiving member in the circumferential direction. A support block pivotally supported to be pivotable in the longitudinal direction of the machine body, an arm fixed to the lower end portion of the central lever receiving member and projecting to both sides in the machine body width direction, and a front end portion of the left end portion of the arm A left rod that moves the spool of the directional control valve of the hydraulic system for crawler driving with the rear end connected to the right side, and a crawler driving fluid with the front end connected to the right end of the arm and the rear end connected to the left crawler driving fluid. A right rod that moves the spool of the pressure direction switching valve, and a left lever that is arranged to be able to tilt in the longitudinal direction of the fuselage to the left and right of the central lever receiving member and to which the lower end of the individual operation lever is connected A first displacement transmission member that transmits the displacement of the left lever reception member to the left rod, and a second displacement transmission member that transmits the displacement of the right lever reception member to the right rod. , At least one of the individual operation levers is bent so that the upper end of the individual operation lever connected to the left lever receiving member is positioned on the right side of the upper end of the individual device lever connected to the right lever receiving member .
[0022]
In the traveling lever device according to claim 4 of the present invention, a central lever receiving member disposed on the cab and connected to a lower end portion of the common operation lever, and an intermediate portion in the vertical direction of the central lever receiving member in the circumferential direction. A support block pivotally supported to be pivotable in the longitudinal direction of the machine body, an arm fixed to the lower end portion of the central lever receiving member and projecting to both sides in the machine body width direction, and a front end portion of the left end portion of the arm A left rod that moves the spool of the directional control valve of the hydraulic system for crawler driving with the rear end connected to the right side, and a crawler driving fluid with the front end connected to the right end of the arm and the rear end connected to the left crawler driving fluid. A right rod that moves the spool of the pressure direction switching valve, and a left lever that is arranged to be able to tilt in the longitudinal direction of the fuselage to the left and right of the central lever receiving member and to which the lower end of the individual operation lever is connected A first displacement transmitting member that transmits the displacement of the left and right lever receiving members to the left end of the arm, and a second displacement transmission that transmits the displacement of the right lever receiving member to the right end of the arm. At least one of the individual operation levers so that the upper end of the individual operation lever connected to the left lever receiving member is located on the right side of the upper end of the individual device lever connected to the right lever receiving member. It is bent.
[0023]
In any of the travel lever devices according to the first to fourth aspects of the present invention, the displacement of the common operation lever having the lower end connected to the central lever receiving member is determined by the central lever receiving member, the arm, and the both rods. To the spool of the directional switching valve of the left crawler driving hydraulic system and the spool of the directional switching valve of the right crawler driving hydraulic system.
[0024]
In the traveling lever device according to the first aspect of the present invention, the displacement of the individual operation lever having the lower end connected to the left lever receiving member is transmitted via the left lever receiving member, the first displacement transmitting member, and the right rod. The displacement of the individual operation lever, which is transmitted to the spool of the left-side crawler driving hydraulic pressure direction switching valve and whose lower end is connected to the right lever receiving member, is transmitted to the right lever receiving member, the second displacement transmitting member, This is transmitted to the spool of the directional switching valve of the hydraulic system for driving the right crawler via the left rod.
[0025]
In the travel lever device according to the second aspect of the present invention, the displacement of the individual operation lever having the lower end connected to the left lever receiving member is detected by the left lever receiving member, the first displacement transmitting member, and the right end of the arm. The displacement of the individual operation lever, which is transmitted to the spool of the directional switching valve of the hydraulic system for driving the left crawler via the right rod and connected to the right lever receiving member at the lower end, Is transmitted to the spool of the directional switching valve of the hydraulic system for driving the crawler on the right side through the displacement transmitting member, the left end of the arm, and the left rod.
[0026]
In the travel lever device according to the third aspect of the present invention, the displacement of the individual operation lever having the upper end positioned on the right side and the lower end connected to the left lever receiving member is defined as the left lever receiving member, An individual control lever that transmits to the spool of the directional switching valve of the hydraulic system for driving the right crawler via the displacement transmitting member and the left rod, the upper end portion being located on the left side, and the lower end portion being coupled to the right lever receiving member Is transmitted to the spool of the direction switching valve of the hydraulic system for driving the left crawler via the right lever receiving member, the second displacement transmitting member, and the right rod.
[0027]
In the traveling lever device according to claim 4 of the present invention, the displacement of the individual operation lever having the upper end portion located on the right side and the lower end portion coupled to the left lever receiving member is referred to as the left lever receiving member, The displacement is transmitted to the spool of the direction switching valve of the hydraulic system for driving the right crawler via the displacement transmitting member, the left end of the arm, and the left rod, and the upper end is located on the left and the lower end is connected to the right lever receiving member. The displacement of the individual operation lever thus transmitted is transmitted to the spool of the direction switching valve of the left crawler driving hydraulic system via the right lever receiving member, the second displacement transmitting member, the right end of the arm, and the right rod.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0029]
1 to 4 show a first example of an embodiment of a travel lever device according to the present invention. In the figure, the same reference numerals as those in FIGS. 9 to 13 denote the same parts. .
[0030]
In this travel lever device, a support block 12 is attached to a gantry 28 provided on the floor surface of the cab of the work machine, and the support block 12 rotates the middle portion of the center lever receiving member 13 in the circumferential direction. It is pivotally supported so that it can tilt in the longitudinal direction of the aircraft.
[0031]
The upper end portion of the central lever receiving member 13 is formed so that the lower end portion of the common operation lever 14 can be attached and detached, and the arm 15 protruding to both sides in the body width direction is fixed to the lower end portion of the central lever receiving member 13. Has been.
[0032]
As shown in FIG. 4, the left end of the arm 15 is connected to the front end of the left rod 16L connected to the spool of the directional switching valve 27 of the hydraulic system for driving the right crawler as shown in FIG. As shown in FIG. 4, the right end portion is connected to the front end portion of the right rod 16R connected to the spool of the directional control valve 26 of the left crawler driving hydraulic system as shown in FIG. 13 is transmitted to the spools of the bidirectional switching valves 27 and 26 via the arm 15 and the rods 16L and 16R.
[0033]
Further, a left lever receiving member 17L and a right lever receiving member 17R are pivotally supported on the front portion of the gantry 28 by a pin 29 extending in the body width direction so as to be tiltable in the front-rear direction.
[0034]
The left lever receiving member 17L is formed so that the lower end portion of the left individual operating lever 18L can be attached and detached. The lower end portion of the left lever receiving member 17L has an upper end portion of the intermediate lever 30 extending obliquely downward to the right. It is fixed.
[0035]
As shown in FIG. 4, the lower end of the intermediate lever 30 is connected to the vicinity of the front end of the right rod 16R by the first joint member 19, and the displacement of the left lever receiving member 17L causes the intermediate lever 30 and the first lever It is transmitted to the right rod 16R via the joint member 19.
[0036]
The right lever receiving member 17R is formed such that the lower end portion of the right individual operation lever 18R can be attached and detached. The upper end portion of the intermediate lever 31 extending obliquely to the lower left is provided at the lower end portion of the right lever receiving member 17R. It is fixed.
[0037]
As shown in FIG. 4, the lower end portion of the intermediate lever 31 is connected to the vicinity of the front end portion of the left rod 16L by the second joint member 20, and the displacement of the right lever receiving member 17R causes the intermediate lever 31 and the second lever It is transmitted to the left rod 16L via the joint member 20.
[0038]
In the travel lever device shown in FIGS. 1 to 4, when operating the work machine using the common operation lever 14, the common operation lever 14 is attached to the center lever receiving member 13.
[0039]
In this state, when the common operation lever 14 is tilted forward, the arm 15 and the rods 16L and 16R move from the neutral position to the rear side in accordance with the displacement of the lower end portion of the center lever receiving member 13, and each liquid The left and right crawlers circulate in the forward direction by the pressure motors 25L and 25R.
[0040]
When the common operation lever 14 is tilted rearward, the arm 15 and the rods 16L and 16R move from the neutral position to the front side with the displacement of the lower end portion of the center lever receiving member 13, and each hydraulic motor The left and right crawlers go around in the reverse direction by 25L and 25R.
[0041]
Further, when turning the work implement to the right, for example, when the common operation lever 14 is rotated clockwise as viewed from above, the arm 15 is also the same as the lower end portion of the center lever receiving member 13 is displaced. Since the left rod 16L moves from the neutral position to the front side and the right crawler circulates in the backward direction, the right rod 16R moves from the neutral position to the rear side and the left crawler moves in the forward direction. The work implement is turned to the right.
[0042]
On the contrary, when the work implement is turned to the left, for example, when the common operation lever 14 is rotated counterclockwise when viewed from above, the lower end of the center lever receiving member 13 is displaced. Since the arm 15 also rotates in the same direction, the left rod 16L moves rearward from the neutral position and the right crawler circulates in the forward direction, and the right rod 16R moves forward from the neutral position to the left side. The crawler turns around in the reverse direction, and the work implement is turned to the left.
[0043]
Further, in the traveling lever device shown in FIGS. 1 to 4, when the work implement is operated using the individual operation levers 18L and 18R, the left individual operation lever 18L is attached to the left lever receiving member 17L, and the right lever The right individual operation lever 18R is attached to the receiving member 17R.
[0044]
In this state, when the individual operation levers 18L and 18R are both tilted forward, the arm 15 and the rods 16L and 16R are moved backward from the neutral position in accordance with the displacement of the lower ends of the lever receiving members 17L and 17R. The left and right crawlers circulate in the forward direction by the hydraulic motors 25L and 25R.
[0045]
When the individual operation levers 18L and 18R are both tilted rearward, the arm 15 and the rods 16L and 16R move from the neutral position to the front side in accordance with the displacement of the lower ends of the lever receiving members 17L and 17R. The left and right crawlers circulate in the reverse direction by the hydraulic motors 25L and 25R.
[0046]
Further, when turning the work implement to the right, for example, the left individual operation lever 18L is tilted forward, the left crawler is rotated in the forward direction, and the right individual operation lever 18R is tilted backward. By turning the right crawler around in the reverse direction, the work implement is turned to the right.
[0047]
On the contrary, when turning the work implement to the left, for example, the right individual operation lever 18R is tilted forward, the right crawler is rotated in the forward direction, and the left individual operation lever 18L is The work implement is turned to the left by tilting backward and rotating the left crawler in the reverse direction.
[0048]
1 to 4, the left individual operation lever 18L is attached to the right rod 16R connected to the direction switching valve 26 of the left crawler driving hydraulic system. The variation of the left lever receiving member 17L is transmitted via the intermediate lever 30 and the first joint member 19 to the left rod 16L connected to the direction switching valve 27 of the hydraulic system for driving the right crawler. On the other hand, since the variation of the right lever receiving member 17R to which the right individual operating lever 18R is mounted is transmitted via the intermediate lever 31 and the second joint member 20, the traveling lever device shown in FIGS. Similar operation forms can be reproduced.
[0049]
1 to 4, the displacement of the intermediate levers 30 and 31 is transmitted to the rods 16R and 16L via the joint members 19 and 20, but the displacement of the intermediate levers 30 and 31 is used. May be transmitted to the right end and the left end of the arm 15.
[0050]
5 to 8 show a second example of the embodiment of the traveling lever device of the present invention. In the figure, the parts denoted by the same reference numerals as those in FIGS. 1 to 4 represent the same thing. .
[0051]
In this travel lever device, a left lever receiving member 21L and a right lever receiving member 21R are pivotally supported on the front portion of the gantry 28 by a pin 29 extending in the body width direction so as to be tiltable in the front-rear direction.
[0052]
The left lever receiving member 21L is formed so that the lower end of the left individual operation lever 22L can be attached and detached. The upper end of the intermediate lever 32 extending downward is fixed to the lower end of the left lever receiving member 21L. ing.
[0053]
As shown in FIG. 8, the lower end portion of the intermediate lever 32 is connected to the vicinity of the front end portion of the left rod 16L by the first joint member 23, and the displacement of the left lever receiving member 21L causes the intermediate lever 32 and the first lever to be displaced. It is transmitted to the left rod 16L via the joint member 23.
[0054]
The right lever receiving member 21R is formed so that the lower end of the right individual operation lever 22R can be attached and detached. The upper end of the intermediate lever 33 extending downward is fixed to the lower end of the right lever receiving member 21R. ing.
[0055]
As shown in FIG. 8, the lower end portion of the intermediate lever 33 is connected to the vicinity of the front end portion of the right rod 16R by the second joint member 24, and the displacement of the right lever receiving member 21R is changed between the intermediate lever 33 and the second lever. It can be transmitted to the right rod 16R via the joint member 24.
[0056]
Further, the upper end portion of the left individual operation lever 22L connected to the left lever receiving member 21L is positioned on the right side of the upper end portion of the right individual operation lever 22R connected to the right lever receiving member 21R as shown in FIG. The intermediate portion of the left individual operation lever 22L is bent forward and right so as not to hinder the tilting of the right individual operation lever 22R in the front-rear direction.
[0057]
In the travel lever device shown in FIGS. 5 to 8, when operating the working machine using the common operation lever 14, the common operation lever 14 is attached to the center lever receiving member 13.
[0058]
In this state, when the common operation lever 14 is rotated clockwise or counterclockwise when viewed from the front side, the rear side, and the upper side, similarly to the work machine to which the traveling lever device shown in FIGS. 1 to 4 is applied. The work implement moves forward, reverse, turn right, or turn left.
[0059]
5 to 8, when the work implement is operated using the individual operation levers 22L and 22R, the left individual operation lever 22L is attached to the left lever receiving member 21L, and the right lever The right individual operation lever 22R is attached to the receiving member 21R.
[0060]
When the individual operation levers 22L and 22R are both tilted forward in this state, the arm 15 and the rods 16L and 16R are moved from the neutral position to the rear side in accordance with the displacement of the lower ends of the lever receiving members 21L and 21R. The left and right crawlers circulate in the forward direction by the hydraulic motors 25L and 25R.
[0061]
When the individual operation levers 22L and 22R are both tilted rearward, the arm 15 and the rods 16L and 16R move forward from the neutral position in accordance with the displacement of the lower end portions of the lever receiving members 21L and 21R. The left and right crawlers circulate in the reverse direction by the hydraulic motors 25L and 25R.
[0062]
Further, when turning the work implement to the right, for example, the left individual operation lever 22L (the upper end portion is on the right side) is tilted backward to rotate the right crawler in the reverse direction and the right individual The operation lever 18R (the upper end portion is on the left side) is tilted forward, and the left crawler is turned in the forward direction, thereby turning the work implement to the right.
[0063]
On the contrary, when turning the work implement to the left, for example, the right individual operation lever 18R (the upper end portion is on the left side) is tilted rearward to rotate the left crawler in the reverse direction. At the same time, the left individual operation lever 18L (the upper end portion is on the right side) is tilted rearward to rotate the left crawler in the backward direction, thereby turning the work implement to the left.
[0064]
Thus, in the travel lever device shown in FIGS. 5 to 8, the upper end portion is located on the left side with respect to the right rod 16R connected to the direction switching valve 26 of the left crawler driving hydraulic system. The displacement of the right lever receiving member 21R to which the right individual operation lever 22R is mounted is transmitted via the intermediate lever 32 and the second joint member 24, and is connected to the right crawler driving hydraulic pressure direction switching valve 27. The displacement of the left lever receiving member 21L, to which the left individual operating lever 22L whose upper end is located on the right side, is transmitted to the left rod 16L through the intermediate lever 33 and the first joint member 23. Therefore, the same operation mode as the traveling lever device shown in FIGS. 9 and 10 can be reproduced.
[0065]
5 to 8, the displacement of the intermediate levers 32 and 33 is transmitted to the rods 16L and 16R via the joint members 23 and 24. However, the displacement of the intermediate levers 32 and 33 is not limited. May be transmitted to the left end and right end of the arm 15, and instead of bending the upper end of the left individual operation lever 22L to the right, the upper end of the right individual operation lever 22R is bent to the left. May be.
[0066]
It should be noted that the travel lever device of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
[0067]
【The invention's effect】
As described above, according to the traveling lever device of the present invention, various excellent effects as described below can be obtained.
[0068]
(1) In any of the travel lever devices according to the first and third aspects of the present invention, the displacement of the common operating lever whose lower end is coupled to the central lever receiving member is determined by the central lever receiving member, the arm, Via the rod, the displacement of the left and right crawler driving hydraulic system direction switching valve is transmitted to each lever receiving member. , Because it transmits to the spool of the directional control valve of the hydraulic system for driving the left and right crawlers through the rod, the operation form using the common operation lever and the operation form using the individual operation levers by simply exchanging the operation lever Can be implemented.
[0069]
(2) In any of the traveling lever devices according to the second and fourth aspects of the present invention, the displacement of the common operating lever whose lower end is coupled to the central lever receiving member is determined by the central lever receiving member, the arm, Via the rod, the displacement of the left and right crawler driving hydraulic system direction switching valve is transmitted to each lever receiving member. , Through the arms and rods, it is transmitted to the spool of the directional switching valve of the hydraulic system for driving the left and right crawlers. Form.
[Brief description of the drawings]
FIG. 1 is a side view showing a first example of an embodiment of a travel lever device of the present invention.
FIG. 2 is a view taken in the direction of arrows II-II in FIG.
FIG. 3 is a view taken in the direction of arrows III-III in FIG. 1;
4 is a conceptual diagram showing the relationship between each operation lever and the crawler driving hydraulic system related to FIG. 1. FIG.
FIG. 5 is a side view showing a second example of the embodiment of the travel lever device of the present invention.
6 is a view taken along arrow VI-VI in FIG. 5;
7 is a view taken along arrow VII-VII in FIG. 5;
FIG. 8 is a conceptual diagram showing the relationship between each operation lever and the crawler driving hydraulic system related to FIG. 5;
FIG. 9 is a side view showing an example of a conventional travel lever device.
10 is a conceptual diagram showing a relationship between each operation lever and the crawler driving hydraulic system related to FIG. 9;
FIG. 11 is a side view showing another example of a conventional travel lever device.
12 is a view taken along arrow XII-XII in FIG.
13 is a conceptual diagram showing a relationship between each operation lever and the crawler driving hydraulic system related to FIG. 11. FIG.
[Explanation of symbols]
12 Support block
13 Center lever receiving member
14 Common control lever
15 arms
16L left rod
16R Right rod
17L Left side lever receiving member
17R Right lever receiving member
18L Left individual control lever
18R Right individual control lever
19 1st joint member (1st displacement transmission member)
20 Second joint member (second displacement transmission member)
21L Left lever receiving member
21R Right lever receiving member
22L Left individual control lever
22R Right individual control lever
23 first joint member (first displacement transmission member)
24 2nd joint member (2nd displacement transmission member)
26 direction switching valve (hydraulic system for crawler drive on left side)
27 Directional switching valve (right crawler drive hydraulic system)
30 Intermediate lever (first displacement transmission member)
31 Intermediate lever (second displacement transmission member)
32 Intermediate lever (first displacement transmission member)
33 Intermediate lever (second displacement transmission member)

Claims

A central lever receiving member that is arranged on the cab and to which the lower end of the common operating lever is connected, and an intermediate portion in the vertical direction of the central lever receiving member is pivotally supported to be rotatable in the circumferential direction and tiltable in the longitudinal direction of the aircraft. A supporting block, an arm fixed to the lower end portion of the central lever receiving member and projecting to both sides in the body width direction, a front end portion connected to the left end portion of the arm, and a rear end portion of the hydraulic pressure for driving the right crawler A left rod that moves the spool of the directional switching valve of the system, a right rod that moves the spool of the directional switching valve of the hydraulic system for crawler driving whose front end is connected to the right end of the arm and whose rear end is the left side, and A left lever receiving member and a right lever receiving member which are arranged so as to be tiltable in the longitudinal direction of the fuselage on the left and right of the central lever receiving member, and to which the lower end portion of the individual operation lever is connected; A first displacement transmission member for transmitting the displacement of the member to the right rod, the traveling lever device being characterized in that a second displacement transmission member for transmitting the displacement of the right lever receiving member to the left rod.

A central lever receiving member that is arranged on the cab and to which the lower end of the common operating lever is connected, and an intermediate portion in the vertical direction of the central lever receiving member is pivotally supported to be rotatable in the circumferential direction and tiltable in the longitudinal direction of the aircraft. A supporting block, an arm fixed to the lower end portion of the central lever receiving member and projecting to both sides in the body width direction, a front end portion connected to the left end portion of the arm, and a rear end portion of the hydraulic pressure for driving the right crawler A left rod that moves the spool of the directional switching valve of the system, a right rod that moves the spool of the directional switching valve of the hydraulic system for crawler driving whose front end is connected to the right end of the arm and whose rear end is the left side, and A left lever receiving member and a right lever receiving member which are arranged so as to be tiltable in the longitudinal direction of the fuselage on the left and right of the central lever receiving member, and to which the lower end portion of the individual operation lever is connected; A first displacement transmission member that transmits the displacement of the member to the right end portion of the arm, and a second displacement transmission member that transmits the displacement of the right lever receiving member to the left end portion of the arm. Lever device.

A central lever receiving member that is arranged on the cab and to which the lower end of the common operating lever is connected, and an intermediate portion in the vertical direction of the central lever receiving member is pivotally supported to be rotatable in the circumferential direction and tiltable in the longitudinal direction of the aircraft. A supporting block, an arm fixed to the lower end portion of the central lever receiving member and projecting to both sides in the body width direction, a front end portion connected to the left end portion of the arm, and a rear end portion of the hydraulic pressure for driving the right crawler A left rod that moves the spool of the directional switching valve of the system, a right rod that moves the spool of the directional switching valve of the hydraulic system for crawler driving whose front end is connected to the right end of the arm and whose rear end is the left side, and A left lever receiving member and a right lever receiving member which are arranged so as to be tiltable in the longitudinal direction of the fuselage on the left and right of the central lever receiving member, and to which the lower end portion of the individual operation lever is connected; An individual operation lever connected to the left lever receiving member, comprising: a first displacement transmitting member that transmits the displacement of the member to the left rod; and a second displacement transmitting member that transmits the displacement of the right lever receiving member to the right rod. A traveling lever device characterized in that at least one of the individual operation levers is bent so that the upper end of the individual device is positioned on the right side of the upper end of the individual device lever connected to the right lever receiving member.

A central lever receiving member that is arranged on the cab and to which the lower end of the common operating lever is connected, and an intermediate portion in the vertical direction of the central lever receiving member is pivotally supported to be rotatable in the circumferential direction and tiltable in the longitudinal direction of the aircraft. A supporting block, an arm fixed to the lower end portion of the central lever receiving member and projecting to both sides in the body width direction, a front end portion connected to the left end portion of the arm, and a rear end portion of the hydraulic pressure for driving the right crawler A left rod that moves the spool of the directional switching valve of the system, a right rod that moves the spool of the directional switching valve of the hydraulic system for crawler driving whose front end is connected to the right end of the arm and whose rear end is the left side, and A left lever receiving member and a right lever receiving member which are arranged so as to be tiltable in the longitudinal direction of the fuselage on the left and right of the central lever receiving member, and to which the lower end portion of the individual operation lever is connected; A first displacement transmitting member that transmits the displacement of the member to the left end of the arm; and a second displacement transmitting member that transmits the displacement of the right lever receiving member to the right end of the arm, and is coupled to the left lever receiving member. A travel lever device in which at least one of the individual operation levers is bent so that the upper end portion of the individual operation lever is positioned on the right side of the upper end portion of the individual device lever connected to the right lever receiving member. .